def expand(node):
if node.symbol[-1] == "?":
if node.remainder:
rule = node.remainder
extra_child_node = DFSNode(rule[0], node.parent, rule[1:])
expand(extra_child_node)
else:
extra_path = reconstruct_path(node.parent)
extra_phrase = ' '.join(extra_path)
language.append(extra_phrase)
node.symbol = node.symbol[:-1]
if is_terminal(node.symbol) or node.symbol in _NO_EXPAND:
if node.remainder:
rule = node.remainder
child_node = DFSNode(rule[0], node, rule[1:])
expand(child_node)
else:
path = reconstruct_path(node)
phrase = ' '.join(path)
language.append(phrase)
else:
children_nodes = [DFSNode(rule[0], node, rule[1:] + node.remainder)
for rule in grammar[node.symbol]]
for child_node in children_nodes:
expand(child_node)
def expand(node):
if node.symbol[-1] == "?":
if node.remainder:
rule = node.remainder
extra_child_node = DFSNode(rule[0], node.parent, rule[1:])
expand(extra_child_node)
else:
extra_path = reconstruct_path(node.parent)
extra_phrase = ' '.join(extra_path)
language.append(extra_phrase)
node.symbol = node.symbol[:-1]
if is_terminal(node.symbol) or node.symbol in _NO_EXPAND:
if node.remainder:
rule = node.remainder
child_node = DFSNode(rule[0], node, rule[1:])
expand(child_node)
else:
path = reconstruct_path(node)
phrase = ' '.join(path)
language.append(phrase)
else:
children_nodes = [
DFSNode(rule[0], node, rule[1:] + node.remainder)
for rule in grammar[node.symbol]
]
for child_node in children_nodes:
expand(child_node)
def reconstruct_path(node):
terminals = []
while node.parent:
if is_terminal(node.symbol):
terminals.append(node.symbol[1:-1])
elif node.symbol in _NO_EXPAND:
terminals.append(node.symbol)
node = node.parent
terminals.reverse()
return terminals
def reconstruct_path(node):
terminals = []
while node.parent:
if is_terminal(node.symbol):
terminals.append(node.symbol[1:-1])
elif node.symbol in _NO_EXPAND:
terminals.append(node.symbol)
node = node.parent
terminals.reverse()
return terminals